📚 Year 7 WJEC Chemistry: Full Curriculum Breakdown | Year 7 WJEC 化学：课程大纲全面解析
This article provides a complete walk-through of the Year 7 WJEC Chemistry curriculum. It covers the essential knowledge, practical skills and assessment styles that pupils encounter during their first year of secondary science in Wales, laying the foundation for GCSE studies and beyond.
本文全面解读 Year 7 WJEC 化学课程大纲。文中涵盖威尔士中学第一年科学课程中的核心知识、实验技能与评估方式，为后续 GCSE 及更高层次的学习打好坚实基础。
1. Introduction to the WJEC Year 7 Chemistry Curriculum | WJEC Year 7 化学课程导论
The Year 7 Chemistry strand, delivered as part of the integrated WJEC Science programme in Wales, follows the principles of the Curriculum for Wales. It emphasises curiosity, enquiry and the development of transferable skills. Chemistry topics are interwoven with physics and biology to help students see how the sciences connect with their everyday lives.
Year 7 的化学部分在威尔士融合型 WJEC 科学课程中展开，遵循《威尔士课程》的育人理念，着力培养学生的好奇心、探究能力与可迁移技能。化学主题与物理、生物内容交错编排，旨在让学生体会科学与日常生活的紧密联系。
Pupils begin to use scientific language with increasing precision, record observations systematically and link macroscopic phenomena to microscopic models. The curriculum builds from concrete, hands-on experiences towards abstract thinking, ensuring that every learner can progress from their own starting point.
学生逐步学会更准确地使用科学语言，系统记录观察，并将宏观现象与微观模型建立联系。课程设计从具体的动手体验过渡到抽象思维，确保每位学习者都能从自己的起点取得进步。
2. Working Scientifically: Skills and Enquiry | 科学探究：技能与方法
Before diving into chemical content, Year 7 students are introduced to the skills needed to 'work scientifically'. This includes planning investigations, identifying independent, dependent and control variables, making accurate measurements and evaluating data.
在深入了解化学内容之前，Year 7 学生首先要掌握“科学探究”所需的技能。这包括设计探究方案、识别自变量、因变量和控制变量、进行准确测量以及评估数据。
Safety in the laboratory is a priority. Pupils learn to use Bunsen burners safely, handle glassware correctly, and recognise hazard symbols. They practise writing methods in clear steps and drawing results tables with headings that include units.
实验室安全是重中之重。学生将学习安全使用本生灯、正确操作玻璃器皿，并识别常见危险标志。他们还要练习用清晰的步骤书写实验方法，并绘制标明单位的记录表格。
- Planning: decide on a question and predict an outcome.
- Observing: use senses and instruments to collect data.
- Recording: organise results in tables and graphs.
- Evaluating: assess reliability, spot anomalies and suggest improvements.
- 计划：明确问题并预测结果。
- 观察：运用感官和仪器收集数据。
- 记录：用表格和图表整理结果。
- 评估：评价可靠性，识别异常并提出改进建议。
3. The Particle Model and States of Matter | 粒子模型与物质状态
One of the first big ideas in Year 7 Chemistry is that all matter is made of tiny particles. The particle model explains the properties of solids, liquids and gases by describing how particles are arranged and how they move.
Year 7 化学的第一个重要概念是：所有物质均由微小粒子构成。粒子模型通过描述粒子的排列方式和运动状态，解释了固体、液体和气体的性质。
In solids, particles are closely packed in a regular pattern and vibrate in fixed positions. Liquids have particles that are close together but can slide past one another, allowing them to flow. Gas particles are far apart, moving rapidly in all directions.
在固体中，粒子紧密规则排列，只能在固定位置振动。液体粒子彼此靠近但可相互滑动，因此能够流动。气体粒子间距很大，向各个方向快速运动。
Changes of state, such as melting, freezing, boiling and condensing, are understood in terms of energy transfer. During melting, energy makes particles vibrate faster until they can break free from their fixed arrangement. The reverse happens during freezing.
状态变化（熔化、凝固、沸腾、冷凝）可以用能量转移来解释。熔化时，能量使粒子振动加快，直至挣脱固定排列；凝固过程则相反。
solid ⇌ liquid ⇌ gas
固体 ⇌ 液体 ⇌ 气体
4. Atoms, Elements and the Periodic Table | 原子、元素与周期表
A Year 7 pupil is introduced to the idea that elements are pure substances made of only one type of atom. All known elements are organised in the Periodic Table, where they are arranged by their atomic number and grouped by similar chemical properties.
Year 7 学生将认识到元素是仅由一种原子组成的纯净物。所有已知元素都排列在周期表中，按原子序数递增排列，并根据相似的化学性质划入不同族。
Students learn the difference between metals and non‑metals based on their position in the table and their typical properties: metals are often shiny, malleable and good conductors; non‑metals tend to be dull and poor conductors.
学生通过元素在周期表的位置及其典型性质来区分金属与非金属：金属通常有光泽、可延展且导热导电良好；非金属一般无光泽，是热和电的不良导体。
Memorising chemical symbols is an important early step. The table below lists some common elements pupils are expected to know.
记住化学符号是重要起始步。下表列出了学生应掌握的一些常见元素。
| Element | Symbol | 元素 |
|---|---|---|
| Hydrogen | H | 氢 |
| Oxygen | O | 氧 |
| Carbon | C | 碳 |
| Sodium | Na | 钠 |
| Chlorine | Cl | 氯 |
| Iron | Fe | 铁 |
5. Compounds, Mixtures and Separation Techniques | 化合物、混合物与分离方法
A compound is a substance formed when two or more different elements chemically combine in fixed proportions. Water (H₂O) and carbon dioxide (CO₂) are classic examples. Unlike mixtures, compounds have properties that are entirely different from the elements they contain.
化合物是由两种或多种不同元素以固定比例通过化学方式结合而成的物质。水 (H₂O) 和二氧化碳 (CO₂) 是典型例子。与混合物不同，化合物的性质与其组成元素的性质截然不同。
Mixtures are combinations of substances that are not chemically joined. Because the components keep their own properties, they can be physically separated. Year 7 pupils explore several separation methods based on differences in physical properties.
混合物是未发生化学结合的物质混合体。由于各组分保持自身性质，因而可通过物理方法分离。Year 7 学生将探索几种基于物理性质差异的分离方法。
- Filtration separates an insoluble solid from a liquid, e.g. sand from water.
- Evaporation removes a dissolved solid by heating, leaving the solid behind.
- Distillation separates a solvent from a solution by boiling and condensing the vapour.
- Chromatography separates dissolved substances that travel at different speeds through a medium.
- 过滤：将不溶性固体与液体分离，例如沙子与水。
- 蒸发：通过加热除去溶剂，留下可溶性固体。
- 蒸馏：利用沸腾与冷凝将溶剂从溶液中分离。
- 色谱：根据溶质在介质中移动速度的不同进行分离。
6. Chemical Reactions: Signs, Equations and Energy Changes | 化学反应：现象、方程式与能量变化
A chemical reaction occurs when starting substances (reactants) are transformed into new substances (products). Year 7 students learn to recognise evidence of a reaction: colour change, temperature change, formation of gas (bubbles or fizzing) and formation of a precipitate.
化学反应发生时，起始物质（反应物）转变成新物质（生成物）。Year 7 学生要学会识别反应的证据：颜色变化、温度变化、有气体产生（气泡或嘶嘶声）以及生成沉淀。
Simple word equations are introduced to represent reactions. For example, the combustion of magnesium is written as:
magnesium + oxygen → magnesium oxide
引入简单的文字方程式来表示反应。例如，镁的燃烧可写为：
镁 + 氧气 → 氧化镁
Pupils also discover that some reactions release heat (exothermic) while others absorb heat (endothermic). A common classroom demonstration is the reaction between sodium hydrogen carbonate and citric acid, which feels cold to the touch.
学生还会发现，有些反应释放热量（放热反应），有些则吸收热量（吸热反应）。常见的课堂演示是小苏打与柠檬酸的反应，触摸会感觉很凉。
7. Acids and Alkalis: Properties and Neutralisation | 酸与碱：性质与中和反应
Year 7 chemistry introduces the concepts of acids and alkalis through their everyday examples, such as vinegar (ethanoic acid) and soap (alkaline). Students learn that acids taste sour, are corrosive, and turn blue litmus red, while alkalis feel soapy, are caustic, and turn red litmus blue.
Year 7 化学通过日常例子介绍酸和碱的概念，例如醋（醋酸）和肥皂（碱性）。学生将了解：酸有酸味，具有腐蚀性，可使蓝色石蕊试纸变红；碱有滑腻感，具苛性，可使红色石蕊试纸变蓝。
The pH scale is presented as a measure of acidity or alkalinity, ranging from 0 (very acidic) to 14 (very alkaline), with 7 being neutral. Universal indicator displays a range of colours according to pH, helping pupils visualise the strength of an acid or alkali.
pH 标度是衡量酸碱度的工具，范围从 0（强酸）到 14（强碱），7 为中性。通用指示剂会根据 pH 显示不同颜色，帮助学生直观感受酸碱的强弱。
Neutralisation is defined as a reaction between an acid and an alkali that produces a salt and water:
acid + alkali → salt + water
中和反应被定义为酸与碱反应生成盐和水的过程：
酸 + 碱 → 盐 + 水
A common example is:
HCl + NaOH → NaCl + H₂O
常见实例如：
盐酸 + 氢氧化钠 → 氯化钠 + 水
8. Reactivity Series of Metals | 金属活动性顺序
The reactivity series ranks metals from most reactive to least reactive. In Year 7, pupils typically examine a short series that includes potassium, sodium, calcium, magnesium, zinc, iron and copper. This series is used to predict how metals behave with water, acids and oxygen.
金属活动性顺序将金属按反应性从高到低排列。在 Year 7，学生通常会研究一个较短的序列，包括钾、钠、钙、镁、锌、铁和铜。该顺序用于预测金属与水、酸、氧气的反应行为。
Very reactive metals like sodium react vigorously with cold water, producing hydrogen gas and an alkali. Less reactive metals may only react with steam, while copper shows no reaction with water at all.
反应性极强的金属（如钠）与冷水剧烈反应，生成氢气和碱。反应性较弱的金属可能只能与水蒸气反应，而铜则完全与水不反应。
When metals are added to dilute acids, those above hydrogen in the reactivity series displace hydrogen gas, causing bubbling. This is a classic way to compare reactivity in the laboratory.
将金属加入稀酸中时，活动性顺序排在氢之前的金属会置换出氢气，产生气泡。这是实验室比较金属反应性的经典方法。
Pupils also learn to link the reactivity series with the extraction of metals. Unreactive metals like gold are found native, whereas reactive metals are locked in ores and require electrolysis or reduction with carbon.
学生还将学习把活动性顺序与金属提取联系起来。不活泼的金属如金以单质存在，而活泼金属则存在于矿石中，需要电解或用碳还原。
9. The Earth's Resources and Atmospheric Chemistry | 地球资源与大气化学
Year 7 chemistry begins to explore how chemical processes shape the planet. Pupils learn about the structure of the Earth (crust, mantle, outer core, inner core), the rock cycle and the formation of igneous, sedimentary and metamorphic rocks.
Year 7 化学开始探讨化学过程如何塑造地球。学生将了解地球的结构（地壳、地幔、外核、内核）、岩石循环以及岩浆岩、沉积岩和变质岩的形成。
The composition of the atmosphere is introduced: around 78% nitrogen, 21% oxygen, with small amounts of argon, carbon dioxide and other gases. The role of photosynthesis in producing oxygen and removing carbon dioxide is highlighted, linking chemistry with biology.
课程引入大气的组成：约 78% 氮气、21% 氧气以及少量氩气、二氧化碳和其他气体。着重讲解光合作用释放氧气、消耗二氧化碳的过程，将化学与生物学联系起来。
Concepts of limited natural resources and sustainability are woven into the content. Students debate the use of fossil fuels, the effect of carbon emissions on climate change, and the importance of recycling metals and reducing waste.
有限自然资源与可持续发展的概念融入课程内容。学生们探讨化石燃料的使用、碳排放对气候变化的影响，以及回收金属、减少废弃物的重要性。
10. Assessment Methods and Progression | 评估方式与进阶路径
Assessment in Year 7 WJEC Chemistry is designed to be formative and supportive. Teachers use a mixture of classroom observation, practical quizzes, end‑of‑topic tests and student self‑assessment. The focus is on identifying strengths and areas for improvement rather than simply awarding a grade.
Year 7 WJEC 化学的评估以形成性和支持性为导向。教师综合运用课堂观察、实践测验、单元末测试和学生自评。重点在于发现优势与待改进之处，而非简单地给出分数。
Practical skills are assessed through 'Working Scientifically' tasks. Pupils are expected to demonstrate safe working habits, accurate measurement and the ability to present and interpret data. They also begin to write simple scientific conclusions that refer back to their predictions.
实验技能通过“科学探究”任务进行评估。要求学生展现安全操作习惯、准确测量能力以及展示和解读数据的能力。学生也开始学习撰写能呼应自己预测的简单科学结论。
Feedback is given in line with the Curriculum for Wales progression steps. This ensures that each learner can move at an appropriate pace towards the more demanding concepts introduced in Year 8 and 9, ultimately preparing for WJEC GCSE Chemistry.
反馈按照《威尔士课程》的进步阶梯模式给出，确保每位学习者能以适当节奏向 Year 8 和 Year 9 的更高要求概念迈进，最终为 WJEC GCSE 化学做好准备。
Published by TutorHao | Chemistry Revision Series | aleveler.com
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